"pipe line" meaning in English

{
  "forms": [
    {
      "form": "pipe lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pipe line (plural pipe lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "pipeline"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              202,
              212
            ]
          ],
          "ref": "1960 April 29, “Type \"3\" Diesel-Electric Locomotives for the Southern Region”, in Railway Magazine, page 239:",
          "text": "An inner floor over the whole area of the deck provides a space for all the cable and pipe runs. On one side the cables are cleated into a duct which is sealed against the ingress of water and oil; the pipe lines run underneath the opposite side floor.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of pipeline."
      ],
      "id": "en-pipe_line-en-noun-kJxrjl0N",
      "links": [
        [
          "pipeline",
          "pipeline#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "pipe line"
}

{
  "forms": [
    {
      "form": "pipe lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pipe line (plural pipe lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "pipeline"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              202,
              212
            ]
          ],
          "ref": "1960 April 29, “Type \"3\" Diesel-Electric Locomotives for the Southern Region”, in Railway Magazine, page 239:",
          "text": "An inner floor over the whole area of the deck provides a space for all the cable and pipe runs. On one side the cables are cleated into a duct which is sealed against the ingress of water and oil; the pipe lines run underneath the opposite side floor.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of pipeline."
      ],
      "links": [
        [
          "pipeline",
          "pipeline#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "pipe line"
}